Tom,
I've found a problem in RumlogNG that has become very annoying. If I startup RumlogNG and click on a log entry, usually to QSO | Add QSO Data, RumlogNG beach balls and becomes unresponsive. I then have to force close it. I have been working around it by first putting something in the call sign field and tab.
I'm running 15.6.1 on an Macbook Air M1. RumlogNG is 5.19.5. I can reproduce at will if you need anymore information.
Thank you.
73, Peter wb3izu